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Cisco ISA 500 make VPN Site to Site via DDNS

Hi

I have 2 Cisco ISA 500 and wonder that both of them can make Site to Site VPN via DDNS between Office site and Factory site.

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Re: Cisco ISA 500 make VPN Site to Site via DDNS

I don't see why that wouldn't work. It might not be as stable as Static IPs, but that risk exists with anything that is dynamic.

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Shawn Eftink CCNA/CCDA Please rate all helpful posts and mark correct answers to assist others searching for solutions in the community.
New Member

Re: Cisco ISA 500 make VPN Site to Site via DDNS

Hi Shawn

Is it possible if I make port forward UDP 500 for creating site to site VPN?

Re: Cisco ISA 500 make VPN Site to Site via DDNS

I'm not sure that I understand your question. Why would you need to port forward UDP 500? The ISAs should act as VPN endpoints for the site-to-site VPN. So you setup both ISAs, configure DDNS, and the configure a site-to-site IPSec VPN using the DDNS name in the opposing ISA as its remote peer. In theory that should work without requiring any additional port forwarding.

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Shawn Eftink CCNA/CCDA Please rate all helpful posts and mark correct answers to assist others searching for solutions in the community.
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